Lens apparatus and image pickup apparatus

1. A lens apparatus comprising: a first optical system having a first optical axis, a second optical axis, and a third optical axis in order from an object side to an image side, wherein the first optical system includes (1) a first reflective surface that reflects and bends a light flux of the first optical axis towards a light flux of the second optical axis and (2) a second reflective surface that reflects and bends the light flux of the second optical axis towards a light flux of the third optical axis; a lens mount attachable to a camera body; and an operation member disposed at a position on an image side of the first reflective surface, wherein the operation member is disposed at a position overlapping the first reflective surface when viewed along the first optical axis.

2. The lens apparatus according to claim 1, wherein the operation member is disposed on the image side of the second optical axis.

3. The lens apparatus according to claim 1, wherein the operation member is disposed on the image side of the first reflective surface.

4. The lens apparatus according to claim 1, further comprising a second optical system that is different from the first optical system, wherein the second optical system has a first optical axis, a second optical axis, and a third optical axis in order from an object side to an image side, wherein the second optical system includes (1) a first reflective surface that reflects and bends a light flux of the first optical axis towards a light flux of the second optical axis and (2) a second reflective surface that reflects and bends the light flux of the second optical axis towards a light flux of the third optical axis, wherein a distance between the first optical axis of the first optical system and the first optical axis of the second optical system is longer than a diameter of the lens mount, and wherein a distance between the third optical axis of the first optical system and the third optical axis of the second optical system is shorter than the diameter of the lens mount.

5. The lens apparatus according to claim 4, wherein the third optical axis of the first optical system and the third optical axis of the second optical system are disposed on an inner circumference of the operation member.

6. The lens apparatus according to claim 4, further comprising a lens support member configured to fix the first optical system and the second optical system, wherein operating the operation member moves the lens support member back and forth.

7. The lens apparatus according to claim 6, wherein the operation member has a cam shape that changes a thickness depending on a rotation phase, and wherein sandwiching the cam shape of the operation member between the lens support member and the lens mount moves the lens support member back and forth as the operation member rotates.

8. The lens apparatus according to claim 4, wherein the operation member includes an operation member for focusing, and wherein operating the operation member provides focusing to both of the first optical system and the second optical system.

9. The lens apparatus according to claim 8, wherein each of the first optical system and the second optical system is independently focusable.

10. The lens apparatus according to claim 1, wherein the operation member includes an operation member for adjusting an angle of view.

11. The lens apparatus according to claim 1, wherein the operation member includes an operation member for adjusting a diaphragm.

12. The lens apparatus according claim 1, wherein the operation member is rotatable around an axis that is parallel to the lens mount.

13. The lens apparatus according to claim 1, wherein the operation member is rotatable coaxially with the lens mount.

14. An image pickup apparatus comprising: the lens apparatus according to claim 1; and a camera body configured to hold an image sensor, wherein the operation member does not protrude from a bottom surface of the camera body.